The phrase "addition game" refers to any activity or game that involves adding numbers together to find a total or a sum. It's a fun way to practice and improve your math skills. Full definition
We also know that there will be two main campaigns and lots of addition game modes to battle it out in. (droidgamers.com)
This is especially welcome because of the minor but enjoyable additions the game seems to have received since its last installment. (monstervine.com)
despite their lack of fitness they still dominated possession and chunks of midfield... think with a couple of additions the game on the 13th can be ours for the taking though (justarsenal.com)